Search Results for author: Xiyang Liu

Found 13 papers, 6 papers with code

Hierarchical Vector Quantized Transformer for Multi-class Unsupervised Anomaly Detection

1 code implementation NeurIPS 2023 Ruiying Lu, Yujie Wu, Long Tian, Dongsheng Wang, Bo Chen, Xiyang Liu, Ruimin Hu

First, instead of learning the continuous representations, we preserve the typical normal patterns as discrete iconic prototypes, and confirm the importance of Vector Quantization in preventing the model from falling into the shortcut.

Quantization Unsupervised Anomaly Detection

Prototypes-oriented Transductive Few-shot Learning with Conditional Transport

no code implementations ICCV 2023 Long Tian, Jingyi Feng, Wenchao Chen, Xiaoqiang Chai, Liming Wang, Xiyang Liu, Bo Chen

Transductive Few-Shot Learning (TFSL) has recently attracted increasing attention since it typically outperforms its inductive peer by leveraging statistics of query samples.

Few-Shot Learning

Near Optimal Private and Robust Linear Regression

no code implementations30 Jan 2023 Xiyang Liu, Prateek Jain, Weihao Kong, Sewoong Oh, Arun Sai Suggala

Under label-corruption, this is the first efficient linear regression algorithm to guarantee both $(\varepsilon,\delta)$-DP and robustness.

regression

Machine Learning-Aided Efficient Decoding of Reed-Muller Subcodes

no code implementations16 Jan 2023 Mohammad Vahid Jamali, Xiyang Liu, Ashok Vardhan Makkuva, Hessam Mahdavifar, Sewoong Oh, Pramod Viswanath

Next, we derive the soft-decision based version of our algorithm, called soft-subRPA, that not only improves upon the performance of subRPA but also enables a differentiable decoding algorithm.

DP-PCA: Statistically Optimal and Differentially Private PCA

no code implementations27 May 2022 Xiyang Liu, Weihao Kong, Prateek Jain, Sewoong Oh

For sub-Gaussian data, we provide nearly optimal statistical error rates even for $n=\tilde O(d)$.

Differential privacy and robust statistics in high dimensions

no code implementations12 Nov 2021 Xiyang Liu, Weihao Kong, Sewoong Oh

The key insight is that if we design an exponential mechanism that accesses the data only via one-dimensional robust statistics, then the resulting local sensitivity can be dramatically reduced.

Vocal Bursts Intensity Prediction

KO codes: Inventing Nonlinear Encoding and Decoding for Reliable Wireless Communication via Deep-learning

1 code implementation29 Aug 2021 Ashok Vardhan Makkuva, Xiyang Liu, Mohammad Vahid Jamali, Hessam Mahdavifar, Sewoong Oh, Pramod Viswanath

In this paper, we construct KO codes, a computationaly efficient family of deep-learning driven (encoder, decoder) pairs that outperform the state-of-the-art reliability performance on the standardized AWGN channel.

Benchmarking

Robust and Differentially Private Mean Estimation

1 code implementation NeurIPS 2021 Xiyang Liu, Weihao Kong, Sham Kakade, Sewoong Oh

In statistical learning and analysis from shared data, which is increasingly widely adopted in platforms such as federated learning and meta-learning, there are two major concerns: privacy and robustness.

Federated Learning Meta-Learning

Reed-Muller Subcodes: Machine Learning-Aided Design of Efficient Soft Recursive Decoding

no code implementations2 Feb 2021 Mohammad Vahid Jamali, Xiyang Liu, Ashok Vardhan Makkuva, Hessam Mahdavifar, Sewoong Oh, Pramod Viswanath

To lower the complexity of our decoding algorithm, referred to as subRPA in this paper, we investigate different ways for pruning the projections.

Information Theory Information Theory

MACE: A Flexible Framework for Membership Privacy Estimation in Generative Models

no code implementations11 Sep 2020 Yixi Xu, Sumit Mukherjee, Xiyang Liu, Shruti Tople, Rahul Dodhia, Juan Lavista Ferres

In this work, we propose the first formal framework for membership privacy estimation in generative models.

Adaptive Mixture Regression Network with Local Counting Map for Crowd Counting

1 code implementation ECCV 2020 Xiyang Liu, Jie Yang, Wenrui Ding

The crowd counting task aims at estimating the number of people located in an image or a frame from videos.

Crowd Counting regression

Minimax Optimal Estimation of Approximate Differential Privacy on Neighboring Databases

1 code implementation NeurIPS 2019 Xiyang Liu, Sewoong Oh

We pose it as a property estimation problem, and study the fundamental trade-offs involved in the accuracy in estimated privacy guarantees and the number of samples required.

Minimax Rates of Estimating Approximate Differential Privacy

2 code implementations24 May 2019 Xiyang Liu, Sewoong Oh

We pose it as a property estimation problem, and study the fundamental trade-offs involved in the accuracy in estimated privacy guarantees and the number of samples required.

Information Theory Information Theory

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